Abstract
The development of adventitious shoots of Picea abies was affected by the agar concentration in the culture medium. Increasing the agar concentration from 0.5 to 2.0% decreased vitrification, but at the same time reduced shoot growth and rooting potential. Slightly vitrified plantlets could become acclimatized to greenhouse conditions. The mesophyll of needles developed in vitro was interspersed with large air spaces; the lower the agar concentration, the larger the air spaces. After transfer to the greenhouse, the new needles from the acclimatized plantlets had an anatomy approaching that of plants growing in field.
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von Arnold, S., Eriksson, T. Effect of agar concentration on growth and anatomy of adventitious shoots of Picea abies (L.) Karst. Plant Cell Tiss Organ Cult 3, 257–264 (1984). https://doi.org/10.1007/BF00040345
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DOI: https://doi.org/10.1007/BF00040345